- When I'm reading email (in emacs), I can quickly create a TODO that links back to the current email I'm reading (most of my TODOs, in fact, link to an email, so this is very useful),
- For my org file where I keep notes about the servers I'm running, I might link to a specific line on a remote apache config,
- For a bug report I might link to a specific git commit in a project to look at later
Any TODO that is important gets scheduled, so that it is linked to from the agenda view. In this way it's very hard for me to lose track of anything, despite most of my work communication happening through email. In fact I now prefer email over using something like Basecamp, because org makes it easier for me to manage!